JPG to WEBP Converter

Why convert JPG to WEBP?

WEBP is Google's image format designed specifically for the web. At the same visual quality it produces files 25–35% smaller than JPG, sometimes more on noisy photos. Smaller images mean faster pages, lower bandwidth bills, and better Core Web Vitals — which Google uses as a ranking signal.

JPG vs WEBP: when each wins

How to convert JPG to WEBP

1. Drop your JPG / JPEG files — drag onto the upload zone, click to browse, or paste from clipboard. Up to 30 at once.
2. Pick a quality — 85% is the web default. Drop to 70–75% for thumbnails; raise above 90% only when the result will be edited further.
3. Click Convert — encoding runs locally with the Canvas API. Your files stay on your device.
4. Download — one by one, or all at once as a ZIP.

Quality settings: what to pick

• 90–95%: archival, hero images, or when downstream editing is expected. File savings shrink at this end but are still meaningful.
• 80–90%: the web sweet spot. Visually indistinguishable from the source JPG for almost all photos.
• 60–75%: aggressive compression for thumbnails, list images, or bandwidth-constrained delivery.
• Below 60%: visible blockiness on photos. Acceptable only for previews or placeholders.

A note on re-encoding

JPG and WEBP are both lossy. Every re-encode loses a tiny bit of information — typically invisible at 85% quality, but it accumulates if you re-export the same file repeatedly. For best results, convert from the highest-quality JPG you have, and never round-trip JPG → WEBP → JPG when you can avoid it.

Serving WEBP with a JPG fallback

~3% of users are still on browsers without WEBP support. Use the <picture> element to serve both:

<picture>
  <source srcset="hero.webp" type="image/webp" />
  <img src="hero.jpg" alt="..." />
</picture>

Why WEBP matters for Core Web Vitals

Google uses Core Web Vitals — especially Largest Contentful Paint (LCP) — as a ranking signal. LCP measures how quickly the main image on a page loads. Switching a 600 KB hero JPG to a 400 KB WEBP reduces the bytes the browser must download before it can paint the image, directly improving LCP time. For image-heavy pages like product listings, blog posts, or galleries, the cumulative effect across many images is significant and measurable in Search Console.

How to convert JPG to WEBP on Windows

Windows has no built-in JPG-to-WEBP conversion. The fastest option with zero install: use the browser converter above. If you prefer a desktop app, Photoshop 23 (2022) and later supports WEBP via File → Export → Export As → WebP. The free IrfanView handles WEBP via its downloadable plugins package. For command-line workflows, cwebp.exe from Google's WebP binaries converts a single file with cwebp -q 85 input.jpg -o output.webp.

How to convert JPG to WEBP on Mac

macOS Preview does not export WEBP. Options: the browser converter above (batch up to 30, no install), Photoshop 23+ (File → Export → Export As → WebP), or GIMP 2.10+ (File → Export As → choose .webp). For command-line use, brew install webp installs cwebp: run cwebp -q 85 photo.jpg -o photo.webp. For batch conversion in Terminal: for f in *.jpg; do cwebp -q 85 "$f" -o "${f%.jpg}.webp"; done.

Bulk converting a website's images from JPG to WEBP

For a one-time bulk conversion of a static site's assets, the batch converter here handles 30 files per run. For an ongoing automated pipeline — new product photos, user-uploaded images — consider a server-side solution: ImageMagick with -format webp, or a CDN like Cloudflare Images or Cloudinary that auto-converts on upload and serves the optimal format per browser. For WordPress sites, the ShortPixel or WebP Express plugins convert and cache WEBP versions automatically.

Privacy

Every byte stays in your browser. No upload, no temporary server file, no log. The conversion runs in a <canvas> element using the browser's built-in WEBP encoder.

Frequently asked questions